Common Access Card (CAC) reader Login issues.

When logging into a Venue 11 Pro 7139 using the internal Common Access Card (CAC) reader, the user may encounter the following errors:.

When waking after a long period of sleep, logging in through the reader results in a 20 to 40 second wait while displaying the message: "Reading credentials."

The user reports that the authentication screen does not launch after pressing the Ctrl+Alt+Del login prompt, and in some cases causes a delay that requiring the user to power the system off, then reboot.

The system may display an error message stating: "No valid certificates found" when trying to authenticate.

Solution.

The internal O2Micro Common Access Card (CAC) reader in the Venue 11 Pro 7139 only supports character level transfers.

Some CAC’s rely on Application Protocol Data Unit (APDU) level and Transport Protocol Data Unit (TPDU) level transfers, these are part of the Open Systems Interconnection model (OSI Model) of network protocols, that cannot be efficiently managed by the Venue 11 Pro 7139 internal CAC reader.

If CAC cards configured on APDU level and TPDU level transfers are the cause of the error, then the following recommendations may apply:

Some external CAC readers include an internal firmware controller that are designed to manage APDU and TPDU level transfers.